internal void EndSet(int i, Type stackType)
{
Debug.Assert(_paramTypes[i].IsByRef);
var argType = _paramTypes[i].GetElementType();
ProxyCodes.Convert(_il, stackType, argType, false);
ProxyCodes.Stind(_il, argType);
}
internal void EndSet(Type stackType)
{
ProxyCodes.Convert(_il, stackType, typeof(T), false);
_il.Emit(OpCodes.Stelem_Ref);
}
/// <summary> 添加方法实现 </summary>
/// <param name="mi"></param>
/// <returns></returns>
private MethodBuilder AddMethodImpl(MethodInfo mi)
{
var parameters = mi.GetParameters();
var paramTypes = ParamTypes(parameters, false);
var mdb = _tb.DefineMethod(mi.Name, MethodAttributes.Public | MethodAttributes.Virtual, mi.ReturnType, paramTypes);
if (mi.ContainsGenericParameters)
{
var ts = mi.GetGenericArguments();
var ss = new string[ts.Length];
for (var i = 0; i < ts.Length; i++)
{
ss[i] = ts[i].Name;
}
var genericParameters = mdb.DefineGenericParameters(ss);
for (var i = 0; i < genericParameters.Length; i++)
{
genericParameters[i].SetGenericParameterAttributes(ts[i].GetTypeInfo().GenericParameterAttributes);
}
}
var il = mdb.GetILGenerator();
var args = new ParametersArray(il, paramTypes);
// object[] args = new object[paramCount];
il.Emit(OpCodes.Nop);
var argsArr = new GenericArray <object>(il, ParamTypes(parameters, true).Length);
for (var i = 0; i < parameters.Length; i++)
{
// args[i] = argi;
if (parameters[i].IsOut)
{
continue;
}
argsArr.BeginSet(i);
args.Get(i);
argsArr.EndSet(parameters[i].ParameterType);
}
// object[] packed = new object[PackedArgs.PackedTypes.Length];
var packedArr = new GenericArray <object>(il, PackedArgs.PackedTypes.Length);
// packed[PackedArgs.DispatchProxyPosition] = this;
packedArr.BeginSet(PackedArgs.DispatchProxyPosition);
il.Emit(OpCodes.Ldarg_0);
packedArr.EndSet(typeof(ProxyExecutor));
// packed[PackedArgs.DeclaringTypePosition] = typeof(iface);
var typeGetTypeFromHandle = typeof(Type).GetRuntimeMethod("GetTypeFromHandle", new[] { typeof(RuntimeTypeHandle) });
_assembly.GetTokenForMethod(mi, out var declaringType, out var methodToken);
packedArr.BeginSet(PackedArgs.DeclaringTypePosition);
il.Emit(OpCodes.Ldtoken, declaringType);
il.Emit(OpCodes.Call, typeGetTypeFromHandle);
packedArr.EndSet(typeof(object));
// packed[PackedArgs.MethodTokenPosition] = iface method token;
packedArr.BeginSet(PackedArgs.MethodTokenPosition);
il.Emit(OpCodes.Ldc_I4, methodToken);
packedArr.EndSet(typeof(int));
// packed[PackedArgs.ArgsPosition] = args;
packedArr.BeginSet(PackedArgs.ArgsPosition);
argsArr.Load();
packedArr.EndSet(typeof(object[]));
// packed[PackedArgs.GenericTypesPosition] = mi.GetGenericArguments();
if (mi.ContainsGenericParameters)
{
packedArr.BeginSet(PackedArgs.GenericTypesPosition);
var genericTypes = mi.GetGenericArguments();
var typeArr = new GenericArray <Type>(il, genericTypes.Length);
for (var i = 0; i < genericTypes.Length; ++i)
{
typeArr.BeginSet(i);
il.Emit(OpCodes.Ldtoken, genericTypes[i]);
il.Emit(OpCodes.Call, typeGetTypeFromHandle);
typeArr.EndSet(typeof(Type));
}
typeArr.Load();
packedArr.EndSet(typeof(Type[]));
}
for (var i = 0; i < parameters.Length; i++)
{
if (!parameters[i].ParameterType.IsByRef)
{
continue;
}
args.BeginSet(i);
argsArr.Get(i);
args.EndSet(i, typeof(object));
}
var invokeMethod = SDelegateInvoke;
if (IsGenericTask(mi.ReturnType))
{
var returnTypes = mi.ReturnType.GetGenericArguments();
invokeMethod = SDelegateinvokeAsyncT.MakeGenericMethod(returnTypes);
}
else if (mi.ReturnType == typeof(Task))
{
invokeMethod = SDelegateInvokeAsync;
}
else if (mi.ReturnType != typeof(void))
{
var returnType = mi.ReturnType;
invokeMethod = SDelegateInvokeT.MakeGenericMethod(returnType);
}
// Call AsyncDispatchProxyGenerator.Invoke(object[]), InvokeAsync or InvokeAsyncT
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, _fields[InvokeActionFieldAndCtorParameterIndex]);
packedArr.Load();
il.Emit(OpCodes.Callvirt, invokeMethod);
if (mi.ReturnType != typeof(void))
{
ProxyCodes.Convert(il, typeof(object), mi.ReturnType, false);
}
else
{
il.Emit(OpCodes.Pop);
}
il.Emit(OpCodes.Ret);
_tb.DefineMethodOverride(mdb, mi);
return(mdb);
}
